[Bug 92659] New: Sony Vaio Z2 laptop; attempt to use external HDMI monitor gives pipe A stuck

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92659

            Bug ID: 92659
           Summary: Sony Vaio Z2 laptop; attempt to use external HDMI
                    monitor gives pipe A stuck
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: john at calva.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

With kernel 4.2.3 attempting to set an external HDMI monitor as the primary
screen in Gnome (function/F7 or from tools menu) moves the display to the
external monitor but gnome stops responding.

dmesg shows:

[ 1289.604921] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.613146] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.621230] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.629174] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.637050] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.644877] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.652712] [drm:intel_dp_start_link_train [i915]] *ERROR* too many full
retries, give up
[ 1289.652894] [drm:intel_dp_complete_link_train [i915]] *ERROR* failed to
train DP, aborting
[ 1289.684550] [drm:__intel_set_mode [i915]] *ERROR* mode set failed: pipe A
stuck

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